OER Parts offers a wide selection of Oil System & Parts for your Mercury Cougar. OER Parts offers Mercury Cougar Bypass Valves, Mercury Cougar Dipsticks and Tubes, Mercury Cougar Filter Adapters, Mercury Cougar Oil Coolers, Mercury Cougar Oil Filters, Mercury Cougar Oil Pan Baffles, Mercury Cougar Oil Pans, Mercury Cougar Oil Pickup Tubes, Mercury Cougar Oil Pumps, and Mercury Cougar Oil Senders.